Вход

вход по аккаунту

Патент USA US3033420

код для вставки на сайт или в блог

Ширина: (aвто)

Высота:

ссылки на документ

адрес страницы документа

адрес полноэкранного варианта

короткий адрес

May 8, 1962
W. M. HANNEMAN
3,033,410
RIVET SETTER
Filed July 10, 1957
2 Sheets-Sheet 1
NW
United States Patent O??ce
1
3,033,410
Walter M. Hannernan, Wheaten, 111., assignor to Hlinois
RIVET SETTER
Tool Works, Chicago, Ill., a corporation of Illinois '
Filed July 10, 1957, Ser. No. 671,025
3,033,410
Patented May 8, 1962
2
I at 40 and depressed by a ‘?exible member 42 accessible
‘from the rear of the rivet setter. Depression of the oper
ating button 40 causes a projection thereof at 44 to shift
a plunger 46 reciprocably mounted in a slide member 48.
The plunger 46 remains shifted (to the left as viewed in
FIG. 2), by virtue of an over center spring (not shown)
in switch 38 until engaged by lever 52 ‘for return move
This invention is concerned with an apparatus or de
ment as shall later be explained. The end of the plunger
vice for setting rivets, particularly blind rivets.
46 bears against one end 50 of a crescent-shaped lever 52
As is well known, blind fasteners or blind rivets are 10 pivoted at 54 in the machine housing. The lever 52 par_
commonly used when only one side of a workpiece is
tially encircles the pinion 20 and associated parts, and
readily accessible. Such rivets or fasteners generally in
the opposite end thereof is positioned at 56 below the
clude a part which is inserted through a hole and then
large gear 22. A pin 58 (FIG. 2) depends from one
expanded on the backside of a workpanel or the like.
of the spokes 60 of the gear 22, and is positioned to en
Many such blind rivets or fasteners require a considerable
gage the end 56 of the crescent-shaped lever when the
pulling force for properly setting them in position. This
lever has been rocked in a clockwise direction by the
invention is concerned with an apparatus or device for
plunger 46. As will be understood, the gear 22 rotates
applying such a pulling force for setting blind rivets.
in a clockwise direction, in accordance with which the de
This invention is concerned generally with a rivet-setting
pending pin 58 engages the crescent-shaped lever with a
3 Claims. (Cl. 218-42)
apparatus or device which requires an absolute minimum
of skill on the part of the operator.
It is an object of this invention to provide a rivet
setting device or apparatus which is automatically turned
o? at the completion of a rivet-setting operation, and
wherein the parts automatically return to proper position
for the inception of another rivet-setting operation.
It is a further object of this invention to provide a
machine for setting blind rivets which utilizes, as a source
of power, a small universal-type electric motor readily
available in commerce.
Other and further objects and advantages of the pres
cut invention will be apparent from the following descrip-i I
tion when taken in connection with the accompanying
drawings wherein:
FIG. 1 is a front view of a rivet-setting machine con
wiping action, whereby to pivot the crescent-shaped lever
in a counterclockwise direction to return the plunger 46
to its initial position, and thereby to open the switch 38.
The gear is provided with a thickened rim portion 62
(FIGS. 4 and 5) extending through substantially 180° of
arc. A ?ber brake 64 is mounted within the housing 12 ad
jacent the periphery of the gear 22, and is provided with
upper and lower plates 66 and 68, respectively. These
plates may be of ?ber or other suitable brake material, and
preferably are separated by a section 69 of rubber or simi
lar material to facilitate adjustment of the plates. The
plates 66 and 68 are engageable with the thickened rim
portion 62 of the gear 22, and are respectively adjustable
by means of setscrews 70 and .72 threaded through the
housing and having locknuts 74 and 76 threaded thereon.
The pin 58 is designed to open the switch 38 at a particu
structed in accordance with the principles of this inven
lar time (and, in this connection, it will be noted in FIG.
4 that the particular spoke 60 on which the pin is mounted
FIG. 2 is a side sectional view as taken substantially
is of rather considerable arcuate extent and is provided.
along the line 2-2 of FIG. 1;
with a series of apertures 78, any one of which may re-,
FIG. 3 is an enlarged detail view of a portion of 40 ceive the pin 58 for adjusting the timing) and inertia of
FIG. 2;
the motor and gearing continues the parts in motion, but
FIG. 4 is a horizontal sectional view as taken along the
the parts are stopped in a particular position by friction
line 4-—4 of FIG. 2;
of the ‘brake 64. In order to insure stopping of the gear
‘FIG. 5 is an enlarged detail sectional view as taken
substantially in the position intended, a second brake 79,
along the line 5--S in FIG. 4;
similar to the brake 64 preferably is provided and is spaced
FIG. 6 is an enlarged sectional view as taken along the
somewhat less than 90° behind the brake 64.
line 6-—6 in FIG. 4;
The housing 12 is provided with a boss or protuber
FIG. 7 is a side view of an installed rivet, the work
ance 80 having a sleeve bearing 82 therein. The clevis ‘
piece being shown in cross section;
32 to which the connecting rod 28 is pivoted slides in this
'FIG. 8 is a perspective view of the installed rivet; and
hearing. A reducing ?tting 84 has the externally threaded
FIG. 9 is a fragmentary view similar to a part of FIG.
larger end 86 thereof threaded into the protuberance 80,
6 and showing a modi?cation.
and a jam nut 88 locks the ?tting in place. A tube 90
Referring now in greater particularity to the drawings,
is threaded onto the smaller end 92 of the ?tting, and a
tion;
and ?rst to FIGS. 1 and 2, there will be seen a rivet-setting
machine 1!) constructed in accordance with the principles
of this invention. This machine includes a housing, gen
erally designated by the numeral 12, supporting a uni
jam nut 94 securely locks the tubing in place.
_
The threaded end 34 of the clevis 32 is threaded into
‘a rod 96 which is longitudinally reciprocable in the ?tting
84 and in the tube 90. The rod is provided at its outer
versal-type electric motor 14 and gear-reducing unit 16.
end with a reduced section Q8 providing a shoulder 100.
An axial bore 102 extends into the outer end of the rod
The gear-reducing unit 16 has an output shaft 1'8 on
60 and is de?ected laterally out through the side of the
which there is ?xed a pinion 20.
The housing rotatably mounts a large gear 22 (see also
FIG. 4) meshing ‘with the pinion 20 and having. an ec
centric hub or cam 24 extending upwardly therefrom.
The eccentric hub or cam 24 forms a crank rotating with
in a sleeve 26 having ‘a connecting rod 28 formed inte~
gral therewith. The end of the connecting rod 28 is piv
otally connected at 30 to a clevis 32 having a threaded
stud 34 thereon.
rod, as vat 104.
‘
A retractor tube 166 is threaded onto the rod 96 at
168 at a position displaced from the end of the reduced
section 92 of the ?tting 84. The retractor tube is recip_
rocal within the tube 90 which, for purposes of distinc
tion, will hereinafter be referred to as ‘a thrust tube. The
outer end of the retractor tube has a bore which is in
part tapered inwardly, 'as at 110, to urge together the’
?ngers of a collet 112, the rear end of the collet having
The rivet setter 10 is provided with the usual ?exible
electric cord 36 and this is connected through a switch 70 a reduced-diameter section 114 providing a shoulder 116.
A coil spring 118 surrounds the reduced section 114 of
38 to motor 14 (the latter connections not being shown).
the collet and the reduced section 98 of the rod 96, and
The switch has an operating button (FIG. 3) indicated
3,033,410
3
is seated against the shoulders 116 and 100. The inner
surfaces of the collet ?ngers are serrated as at 120 for
gripping a fastener, as will be set forth hereinafter. Fur
thermore, the retractor tube is provided with a lateral
aperture 122 aligned with the side opening 104 of the rod
96, and the thrust tube 90 is provided with a similar
lateral aperture 124.
4
mechanical arrangement is such that the gear 22 can stop
within a few degrees of the dead center position in either
direction without appreciably affecting the position of the
collet ?ngers. Thus, it will be seen that the motor con
trol means and brake means are arranged for starting and
stopping the operation of the large gear in a cyclic pat
tern from a starting position, substantially as shown in
FIG. 4, through substantially 360° of revolution. The
A thrust plate or button 126 closes the outer end of
control means intermittently renders the motor ineffective
the thrust tube and is secured thereto in any satisfactory
manner such as having a reduced portion forming a press 10 to drive the large gear after rotation thereof through sub
fit within the thrust tube. The thrust plate 126 is pro
vided with a tubulation 128 extending internally of the
thrust tube and of the retractor tube to provide stability
stantially 180° from the starting position and the brake
means is operable substantially at the beginning of the
second 180° of rotation of the large gear to frictionally
retard and stop the same substantially at the starting
The blind fastener or rivet with which the rivet setter 15 position. The parts thus are in a position to pick up an
other rivet, and insertion of this rivet forces the broken
heretofore shown and described is to be used is shown
off shank rearwardly through the bore 102 and out
in FIG. 6 in association with the rivet setter, and it is
through the lateral openings 194, 122, and 124.
identi?ed by the numeral 130. The rivet includes an alu
minum tube 132 having an enlarged head 134 at one end
Modi?cation
for the shank of a fastener.
thereof, a circumferential ?ange 136 being interposed be
Under some conditions, it has been found that a broken
tween the head and tube. The rivet also includes a shank
138 having rings or serrations 140 thereon which are
o? shank 138 occasionally may not be properly ejected
gripped by the serrations of the collet ?ngers at 126. The
opposite end of the shank is provided with a slightly en
o? shank is trapped and retained without ejection, then
from the above described mechanism.
When a broken
larged head 142 having scalloped cutting points 144. 25 forward movement of rod 96 upon the next cycle of the
rivet setter places considerable strain on the rivet setter
tending to cause damage to internal parts or to displace
the thrust plate or button 126. Stated another way, some
or sleeve 132 outwardly into petals 146, as shown in
times a broken shank may become trapped internally in
FIGS. 7 and 8. The petals 146 ?are radially outward on
the backside of a workpanel 148 to which a workpiece 30 stead of ejecting rearwardly and the collet, as it moves
forwardly on the next cycle, may engage the trapped piece
159 is thus secured. The shank 138 is provided with a
and cause great pressure on the parts. To guard against
reduced section at 152, ‘and the shank hence breaks off
damage to parts under such a situation, the gripping end
after the head 142 has been pulled in as far as it will go
of the previously described form of the invention may be
to clamp the workpiece 150 against the workpanel 148.
modi?ed as shown in FIG. 9, similar parts being identi?ed
Operation
by similar numerals with the addition of the su?ix a.
The thrust plate of button 126a is formed as a hollow
The serrated shank 140 of one of the rivets 130 is in
cap having internal annular grooves 154. Each such
serted through the thrust plate 126 of the rivet setter,
groove has a rather steep trailing edge 156 ‘and the rear
and is gripped lightly by the serrations of’the collet ?ngers
at 126 due to the action of the spring 118. The tube or 40 groove has a tapered forward edge 158 facilitating mount
ing over other parts to be described. The forward groove
sleeve 132 and head 142 of the rivet then are inserted
preferably has an abrupt forward edge. The cap-like
through a workpiece and a workpanel, and the pushbutton
thrust button 126a ?ts over the end of the thrust tube 90a,
40 is actuated by momentary manual depression thereof.
and an annular groove 160 is formed in the outer surface
This causes movement of plunger 46 to an over-center po
sition which in turn pivots the crescent-shaped lever 52 45 of the tube near the front or outer end thereof. A plastic
or similar elastic, deformable O-ring 162 is received in
in a clockwise direction and simultaneously starts the
the groove 16% and in the forward groove 154 to hold
motor in a counterclockwise direction as viewed in FIG.
the cap-like thrust button in place. The spring 118a
4. This causes clockwise rotation of the large gear 22
preferably is seated on a ?anged ferrule or bushing 114a,
which acts through the hub or crank 24 to pull the con
rather than an integral extension of the collet 112, and
necting rod 28.
the retraction tube 166:: conveniently is threaded at 1128a
This acts through the clevis 32 and the rod 96 to pull
on to the front end of the pull rod (as 96, in FIG. 6).
the retractor tube 106. This causes the cam surface 110
Any force such as from a trapped broken shank as
of the retractor tube to clamp the collet ?ngers 120 tightly
abovementioned tending to displace the thrust button by
in against the serrated shank 140 of the rivet while the
shank is pulled from the rivet, causing the head 142 to 55 forward movement of rod 96 is yieldingly resisted by the
O-ring 162. When a certain limit is reached, the button
shear the tube 132 into the petals 146, as previously indi
slips over the ring, and the ring is received in the second
cated. As ‘also has been indicated, the shank 138 of the
groove 15d. It will be appreciated that the forward
rivet breaks off when fully withdrawn.
groove 154 normally receives the O-ring 162 to secure
Immediately after this breaking of the rivet, the depend
the thrust button on the rivet setting device. The thrust
ing pin 58 on the large gear 22 engages the end 56 of the
When the shank is pulled to ‘advance the head 142 toward
the head 134, the scalloped cutting points shear the tube
crescent-shaped lever 52, thus moving the plunger 46 in
button may then be partially dislocated so as to be se
a reverse direction and opening the switch 33. The motor
thus is deenergized but the parts continue to move by vir~
true of their inertia. However, the thickened rim portion
62 of the large gear 22 now engages the brake 64, and,
cured in the second groove. Sut?cient force eventually
could force the thrust button entirely from the rivet setter
without damage.
It will be understood that the speci?c embodiments of
as a result, the parts coast to a braked stop substantially
the invention as herein shown and described are for illus
in the position shown in the drawings. The second brake
79 engages the thickened portion 62 of the large gear just
after the pin 58 has tripped the lever 52. As the con
trative purposes only. Various changes in structure will
no doubt occur to those skilled in the art, and are to be
understood as forming a part of the invention in so far as
FIG. 4, the eccentric reaches a dead center position, after
claims.
necting rod approaches the fully extended position of 70 they fall within the spirit and scope of the appended
which the connecting rod is reversed in its movement by
I claim:
1. A machine for setting rivets of the type requiring
a pulling force thereon, said machine comprising means
parts to a stop adjacent the dead center position. The 75 for releasably gripping such a rivet, a tractive member
the gear and the eccentric.
This reversal, with proper
adjustment of the brakes, tends to bring all of the moving
3,033,410
6
secured to said gripping means for pulling thereon, a
relatively large gear, means interconnecting said gear
and said tractive member for pulling thereon, a relatively
small gear meshing with said l-arge gear to form therewith
a reducing gear set, a rotary motor, 1a source of power for
rotating the motor to drive said gears to pull, through said
tractive member, said gripping means, and control means
for starting the operation of said large gear in a cyclic
pattern of substantially 360° of revolution from a pre
determined starting position, said control means including
a device internittently operable to connect the source of
3. A machine as claimed in claim 1, wherein the brake
means includes a peripheral enlargement at the side of
the large gear extending throughout substantially half the
periphery thereof and with the major portion of the en
largement located in the second 180° of revolution when
the large gear is in its starting position, and wherein fric
tion means engages the leading end of said enlargement
substantially upon disconnection of the source of power
for retarding rotation of the large gear and stopping the
10 same substantially at its starting position.
References Cited in the ?le of this patent
UNITED STATES PATENTS
power and render the motor effective to start the drive of
said large gear from the starting position, a member car
ried by said large gear for actuating said device to dis
connect the source of power and render the motor ineffec
15
tive to drive the large gear after substantially 180° of
rotation of the large gear, and brake means operable sub
stantially at the beginning of the second 180° of rotation
of the large gear to frictionally retard rotation thereof
and stop the same substantially at its starting position. 20
2. A machine as claimed in claim 1, wherein the inter
mittently operable device includes a pivoted lever having
the inner end thereof positioned adjacent the periphery
of the large gear 1and extending substantially in the direc
25
tion of rotation thereof for wiping actuation of the lever
by the member carried by the large gear.
1,209,381
1,666,275
1,943,139
2,075,162
2,170,323
Bates ________________ .._ Dec. 19,
Walsh _______________ __ Apr. 17,
Myers _________________ ..._ Jan. 9,
Begg ________________ __ Mar. 30,
Gorshko? ____________ __ Aug. 22,
1916
1928
1934
1937
1939
2,384,434
Bettington ___________ _- Sept. 11, 1945
2,406,949
2,465,403
2,571,303
Huck ________________ .._ Sept. 3, 1946
Smith _______________ __ Mar. 29, 1949v
Spiller _______________ __ Oct. 16, 1951
2,595,551
Springate ______________ __ May 6, 1952
2,794,567
2,965,258
Stau _________________ __ June 4, 1957
Wilson et a1 ___________ __ Dec. 20, 1960
Beasley et al __________ __ Nov. 28, 1961
3,010,597